Flue gas denitration device for thermal power plant

Abstract

The invention relates to the technical field of flue gas denitration, and discloses a thermal power plant flue gas denitration device which comprises a base, the upper surface of the base is fixedly connected with a first treatment tank and a second treatment tank, a filter box is arranged between the first treatment tank and the second treatment tank, and two mounting pipes are arranged in the filter box; the top ends of the two mounting pipes penetrate through the filter box and are provided with first connecting pipes, the two first connecting pipes are communicated with each other, the bottom ends of the mounting pipes penetrate through the filter box and are provided with second connecting pipes, and the second connecting pipes are respectively communicated with the first treatment tank and the second treatment tank. According to the flue gas treatment device, flue gas and a gas catalyst can be subjected to a more uniform contact reaction through the first impeller, meanwhile, the flue gas is further denitrated and filtered through the aluminum oxide filter screen, the activated carbon filter screen and the ferric oxide filter screen, and the flue gas can be discharged into the atmosphere after being thoroughly treated.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration device for a thermal power plant. Background Art

[0002] In order to prevent excessive NOx from being produced after coal combustion in the boiler to pollute the environment during thermal power generation, the coal should be denitrified, which is divided into denitrification before combustion, denitrification during combustion, and denitrification after combustion. That is, the NOx in the flue gas is removed. This substance will form acid rain when entering the atmosphere. The flue gas from coal-fired power plants contains these substances, especially in thermal power plants.

[0003] After searching, a Chinese patent with publication number CN212440788U discloses a flue gas denitrification device for a thermal power plant. Through the function of the guide plate, it is closer to the surface of the catalyst box, which is beneficial to the catalytic denitrification reaction. Compared with the traditional device, the denitrification efficiency of the device is improved. However, there are still the following defects. In actual use, due to the concentration difference during denitrification, a small amount of nitrogen oxides or oxidants will be carried out, resulting in the flue gas being discharged into the atmosphere without being completely treated, thereby causing damage to the environment. Summary of the invention

[0004] Technical issues solved

[0005] In view of the deficiencies in the prior art, the present invention provides a flue gas denitration device for a thermal power plant, which is mainly used to solve the problem that a backpack cannot well protect a drinking water cup during travel.

[0006] Technical Solution

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A flue gas denitrification device for a thermal power plant comprises a base, wherein a first treatment tank and a second treatment tank are fixedly connected to the upper surface of the base, a filter box is arranged between the first treatment tank and the second treatment tank, two mounting pipes are arranged inside the filter box, the top ends of the two mounting pipes both pass through the filter box and are installed with a first connecting pipe, and the two first connecting pipes are connected, the bottom ends of the mounting pipes pass through the filter box and are installed with a second connecting pipe, and the second connecting pipes are respectively connected with the first treatment tank and the second treatment tank, an aluminum oxide filter screen, an activated carbon filter screen and a ferric oxide filter screen are arranged in sequence from bottom to top inside the mounting pipe, and the top of the first treatment tank is plugged and fixed with An air inlet pipe, the bottom end of the air inlet pipe is connected and fixed with a spiral tube, a plurality of first air outlet holes are opened on the outer side of the spiral tube, a second motor is fixedly connected to the bottom of the base, one end of the second motor output shaft passes through the second processing tank and is fixedly connected to the second impeller, an annular tube is provided at the bottom of the second processing tank, and one end of the annular tube is connected to the second connecting tube, a plurality of second air outlet holes are opened on the top of the annular tube, an inverted cone plate is fixedly connected to the circumferential inner wall of the second processing tank, a plurality of air holes are opened on the outer side of the inverted cone plate, a partition frame is fixedly connected to the circumferential inner wall of the second processing tank, and a conical plate is fixedly connected to the circumferential inner wall of the second processing tank.

[0009] Furthermore, a first motor is fixedly connected to the bottom of the base, one end of the first motor output shaft passes through the first treatment tank and is fixedly connected to the first impeller, and a plurality of arc-shaped limit rods are fixedly connected to the inner wall of one side of the filter box, and the arc-shaped limit rods clamp the mounting tube.

[0010] On the basis of the above-mentioned solution, the spiral tube is located inside the first treatment tank, and the second impeller is located in the space surrounded by the annular tube.

[0011] As a further solution of the present invention, a feed pipe is connected and fixed to one side of the first processing tank.

[0012] Furthermore, a liquid inlet is provided at the top of the side of the second processing tank, and a liquid inlet pipe is connected and fixed in the liquid inlet.

[0013] On the basis of the above scheme, a liquid outlet is provided at the bottom of the side of the second processing tank, a liquid outlet pipe is connected and fixed in the liquid outlet, and an air outlet pipe is connected and fixed in the top of the second processing tank.

[0014] As a further solution of the present invention, a liquid discharge port is provided on one side of the second processing tank, and a plug is provided in the liquid discharge port.

[0015] Furthermore, the partition frame is located between the conical plate and the inverted conical plate, and the inverted conical plate is located between the partition frame and the annular tube.

[0016] Beneficial Effects

[0017] Compared with the prior art, the present invention provides a flue gas denitrification device for a thermal power plant, which has the following beneficial effects:

[0018] 1. The present invention can not only further denitrify and filter the flue gas through the alumina filter, the activated carbon filter and the ferric oxide filter, but also discharge the flue gas into the atmosphere after thorough treatment, thereby avoiding damage to the environment caused by incomplete denitrification and improving the denitrification effect of the device.

[0019] 2. In the present invention, the rotation of the first impeller can make the flue gas in the first treatment tank and the gas catalyst contact and react more evenly, and the rotation of the second impeller can further disperse and defoam the bubbles, thereby improving the use effect of the device.

[0020] 3. Through the coordinated use of the drain port and the plug, it is convenient for the staff to drain the water on the inclined surface of the cone plate, avoiding water accumulation on the inclined surface of the cone plate, and improving the cleaning effect of the device.

[0021] 4. The present invention provides an arc-shaped limiting rod to position the installation pipe, so that the installation pipe remains stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a flue gas denitration device for a thermal power plant proposed by the present invention;

[0023] Figure 2 A half-section structural schematic diagram of a flue gas denitration device for a thermal power plant proposed by the present invention;

[0024] Figure 3 A partial cross-sectional structural schematic diagram of a flue gas denitration device for a thermal power plant proposed by the present invention;

[0025] Figure 4 This is a schematic cross-sectional structure diagram of a filter box of a flue gas denitration device for a thermal power plant proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of an installation pipe of a flue gas denitration device for a thermal power plant proposed by the present invention.

[0027] In the figure: 1. base; 2. first treatment tank; 3. feed pipe; 4. air inlet pipe; 5. air outlet pipe; 6. liquid inlet pipe; 7. second treatment tank; 8. liquid outlet pipe; 9. first air outlet; 10. first connecting pipe; 11. spiral pipe; 12. first impeller; 13. second connecting pipe; 14. filter box; 15. conical plate; 16. partition frame; 17. inverted cone plate; 18. second air outlet; 19. liquid drain port; 20. plug; 21. second impeller; 22. air hole; 23. annular pipe; 24. arc-shaped limit rod; 25. installation pipe; 26. ferric oxide filter; 27. activated carbon filter; 28. alumina filter. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-Figure 5 A flue gas denitration device for a thermal power plant comprises a base 1, a first treatment tank 2 and a second treatment tank 7 are fixed to the upper surface of the base 1 by bolts, a filter box 14 is arranged between the first treatment tank 2 and the second treatment tank 7, two installation pipes 25 are arranged inside the filter box 14, the top ends of the two installation pipes 25 both pass through the filter box 14 and are installed with a first connecting pipe 10, and the two first connecting pipes 10 are connected, the bottom ends of the installation pipes 25 pass through the filter box 14 and are installed with a second connecting pipe 13, and the second connecting pipe 13 is respectively connected to the first treatment tank 2 and the second treatment tank 7 The inside of the installation pipe 25 is provided with an alumina filter 28, an activated carbon filter 27 and a ferric oxide filter 26 from bottom to top, and the flue gas after the initial denitration enters the installation pipe 25, and is further denitrated and filtered by the alumina filter 28, the activated carbon filter 27 and the ferric oxide filter 26 in sequence to avoid incomplete denitration and residue. The top of the first treatment tank 2 is plugged and fixed with an intake pipe 4, and the bottom end of the intake pipe 4 is connected and fixed with a spiral pipe 11, and a plurality of first air outlet holes 9 are opened on the outer side of the spiral pipe 11, and the flue gas enters the first treatment tank 2 through the intake pipe 4. A spiral tube 11 is provided in a treatment tank 2, and the flue gas is discharged through the first air outlet 9. At the same time, a gas catalyst is added into the first treatment tank 2, and the catalyst denitrates the flue gas uniformly. A second motor is fixed to the bottom of the base 1 by bolts, and one end of the output shaft of the second motor passes through the second treatment tank 7 and is fixed to a second impeller 21 by bolts. The second impeller 21 rotates to further disperse the bubbles. An annular tube 23 is provided at the bottom of the second treatment tank 7, and one end of the annular tube 23 is connected to the second connecting pipe 13. A plurality of second air outlets 18 are provided on the top of the annular tube 23. The circumferential inner wall of the second treatment tank 7 is fixed with an inverted cone plate 17 by bolts, and a plurality of air holes 22 are opened on the outer side of the inverted cone plate 17. The circumferential inner wall of the second treatment tank 7 is fixed with a partition frame 16 by bolts. The circumferential inner wall of the second treatment tank 7 is fixed with a cone plate 15 by bolts. Water is added into the second treatment tank 7 so that the water in the second treatment tank 7 covers the cone plate 15. The flue gas after denitrification enters the annular pipe 23 and discharges bubbles through the second air outlet 18, and the bubbles move upward through the air holes 22 and are discharged along the gap between the partition frame 16 and the cone plate 15.

[0030] In the present invention, it should be noted that a first motor is fixed to the bottom of the base 1 by bolts, one end of the output shaft of the first motor passes through the first treatment tank 2 and is fixed to the first impeller 12 by bolts, the first motor rotates to rotate the first impeller 12, so that the flue gas in the first treatment tank 2 and the gas catalyst can be more evenly contacted and reacted, a plurality of arc-shaped limit rods 24 are fixed to the inner wall of one side of the filter box 14 by bolts, and the arc-shaped limit rods 24 clamp the mounting tube 25, the arc-shaped limit rods 24 can position the mounting tube 25, so that the mounting tube 25 remains stable, the spiral tube 11 is located inside the first treatment tank 2, the second impeller 21 is located in the space surrounded by the annular tube 23, and one side of the first treatment tank 2 is connected and fixed with a feed pipe 3, A liquid inlet is provided at the top of the side of the second treatment tank 7, and a liquid inlet pipe 6 is connected and fixed in the liquid inlet, so as to add water into the second treatment tank 7 conveniently; a liquid outlet is provided at the bottom of the side of the second treatment tank 7, and a liquid outlet pipe 8 is connected and fixed in the liquid outlet, so as to discharge water from the second treatment tank 7 conveniently; an air outlet pipe 5 is connected and fixed at the top of the second treatment tank 7; a liquid discharge port 19 is provided on one side of the second treatment tank 7, and a plug 20 is provided in the liquid discharge port 19. By using the liquid discharge port 19 and the plug 20 in coordination, it is convenient for the staff to discharge the water on the inclined surface of the cone plate 15 to avoid water accumulation on the inclined surface of the cone plate 15; the partition frame 16 is located between the cone plate 15 and the inverted cone plate 17, and the inverted cone plate 17 is located between the partition frame 16 and the annular pipe 23.

[0031] Working principle of this embodiment: when in use, the flue gas enters the spiral tube 11 in the first treatment tank 2 through the air inlet pipe 4, and the flue gas is discharged through the first air outlet 9, and the gas catalyst is added into the first treatment tank 2 through the feed pipe 3, and the first motor is started, and the first motor rotates to rotate the first impeller 12, so that the catalyst evenly denitrates the flue gas, and then the flue gas after the initial denitration enters the second connecting pipe 13 and the installation pipe 25 near the first treatment tank 2, and is further denitrated by the alumina filter 28, the activated carbon filter 27 and the ferric oxide filter 26 in sequence. The flue gas after denitration is denitrated and filtered, and then enters the second connecting pipe 13 and the installation pipe 25 close to the second treatment tank 7 through the first connecting pipe 10, and is denitrated and filtered again, thereby making the denitration effect of the device more thorough. At the same time, water is added to the second treatment tank 7 through the liquid inlet pipe 6 to cover the conical plate 15. The flue gas after denitration enters the annular pipe 23 and discharges bubbles through the second air outlet 18. The second impeller 21 rotates to further disperse the bubbles, and moves the bubbles upward through the air hole 22, and is discharged along the gap between the partition frame 16 and the conical plate 15, and finally discharged from the air outlet pipe 5.

[0032] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0033] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas denitrification device for a thermal power plant, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected with a first treatment tank (2) and a second treatment tank (7), a filter box (14) is provided between the first treatment tank (2) and the second treatment tank (7), two installation pipes (25) are provided inside the filter box (14), the top ends of the two installation pipes (25) both pass through the filter box (14) and are installed with a first connecting pipe (10), and the two first connecting pipes (10) are connected, the bottom ends of the installation pipes (25) pass through the filter box (14) and are installed with a second connecting pipe (13), and the second connecting pipe (13) is respectively connected with the first treatment tank (2) and the second treatment tank (7), the inside of the installation pipe (25) is provided with an aluminum oxide filter (28), an activated carbon filter (27) and a ferric oxide filter (26) in sequence from bottom to top, the top of the first treatment tank (2) is plugged and fixed with an air intake pipe (4), The bottom end of the air inlet pipe (4) is connected and fixed with a spiral tube (11), and a plurality of first air outlet holes (9) are provided on the outer side of the spiral tube (11); a second motor is fixedly connected to the bottom of the base (1); one end of the output shaft of the second motor passes through the second processing tank (7) and is fixedly connected to a second impeller (21); an annular tube (23) is provided at the bottom of the second processing tank (7), and one end of the annular tube (23) is connected to the second connecting tube (13); a plurality of second air outlet holes (18) are provided on the top of the annular tube (23); an inverted cone plate (17) is fixedly connected to the circumferential inner wall of the second processing tank (7), and a plurality of air holes (22) are provided on the outer side of the inverted cone plate (17); a partition frame (16) is fixedly connected to the circumferential inner wall of the second processing tank (7); and a cone plate (15) is fixedly connected to the circumferential inner wall of the second processing tank (7).

2. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: A first motor is fixedly connected to the bottom of the base (1); one end of the first motor output shaft passes through the first processing tank (2) and is fixedly connected to the first impeller (12); a plurality of arc-shaped limit rods (24) are fixedly connected to the inner wall of one side of the filter box (14), and the arc-shaped limit rods (24) clamp the mounting tube (25).

3. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: The spiral tube (11) is located inside the first treatment tank (2), and the second impeller (21) is located in a space surrounded by the annular tube (23).

4. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: A feed pipe (3) is connected and fixed to one side of the first processing tank (2).

5. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: A liquid inlet is provided at the top of the side of the second processing tank (7), and a liquid inlet pipe (6) is connected and fixed in the liquid inlet.

6. A flue gas denitrification device for a thermal power plant according to claim 5, characterized in that: A liquid outlet is provided at the bottom of the side of the second processing tank (7), a liquid outlet pipe (8) is connected and fixed in the liquid outlet, and an air outlet pipe (5) is connected and fixed at the top of the second processing tank (7).

7. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: A liquid discharge port (19) is provided on one side of the second processing tank (7), and a plug (20) is provided inside the liquid discharge port (19).

8. A flue gas denitrification device for a thermal power plant according to claim 1, characterized in that: The partition frame (16) is located between the conical plate (15) and the inverted conical plate (17), and the inverted conical plate (17) is located between the partition frame (16) and the annular tube (23).

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